Hose coupling



Jan# 23 1940- M. KATCHR 2,188,006

HosE oUPLING v Filed March 29. 1937 2 Shets-'Sheet 2 INVENTOR ATTORNEYforms Kutcher i Patented Jan. 23, 1940 UNITED s'rA'r' 1 Claim.

The coupling is suitable for systems operating with extremely high iluidpressures as in said brake system.

Another object of the invention is to provide a simple and reliablecoupling which will be easy to assemble and take apart. When takenaparty or separated from the hose, no portions of the coupling, in oneform of my device, need be discarded, all parts being suitable for useagain. In certain types of couplings now in use, certain parts arepermanently deformed in attaching the hose to the coupling, requiringnew parts when the coupling is to be used again on the same or anotherpiece of hose. Further, said permanent deformation .also makes itdiilicult to remove the hose from the coupling. With said form of myinvention. repair shop mechanics can replace fresh hose on the couplingsby the simple use of an ordinary pipe wrench.

My device uses a separate bushing. In the form noted above, this bushingis given elastic deformation only. In another form, the bushing ispermanently deformed. A construction common to both forms providestapers at both ends for the deformation of the bushing:

Other objects and advantages will become apparent upon further study ofthe description and drawings, in which:

Fig. l is an elevation of the coupling with a piece of hose attached.

Fig. 2 is an elevation of the coupling with its mating parts unscrewed,the split bushing and sleeve being shown loosely mounted on a piece ofhose.

Fig. 3 is a longitudinal section to an enlarged scale through thecoupling and a part of a piece of attached hose. the upper part of thesection passing through the split bushing at the split.

Fig. 4 is a cross-section taken along the line 4 4 of Fig. 3.

Fig. 5 is a perspective view of the split bushing shown by itself.

Fig. 6 is a fragmental longitudinal section to an enlarged scale throughan alternative form of coupling with a piece of hose attached.

Fig. 7 is a fragmental longitudinal section to an enlarged scale of thecoupling of Fig. 3 with the interposition of a ring of split wirebetween the split bushing and the piece of hose shown, the lower part ofthe section passing through the ring at the split.

Fig. 8 is an elevation of the split ring.

Fig. 9 is a longitudinal section to an enlarged scale of a modified formoi the coupling, shown in Fig. 3, having a bushing withcircumferentially continuous walls throughout.

Fig. 10 is a longitudinal section to an enlarged scale of a modifiedform of the coupling of the type of Fig. 6, but with a. bushing havingcircumferentially continuous walls throughout.

Fig. 11 is an elevation of the form of coupling shown in Fig. 9, withthe mating parts unscrewed, the brushing and sleeve being shown looselymounted on a piece of hose, and

Fig. 12 is a cross-section taken along the line I2-I2 of Fig. 9.

The body 9 is provided with a threaded portion I0 at one end, adaptingit to be screwed into a mating part, not shown, of a fluid system. Atthe other end of body 9 is a threaded portion II. Nipple I2 extendsrearwardly from the rear face of said body. Nipple I2 is straight, beingbarbed or serrated for better iluid tight contact with the bore ofrubber hose I3. The term straight" is used as opposed to conical. Body 9is formed with a nut portion I4 thereon intermediate of threadedportions ill and II. The rear face of body 9 is countersunk and tapered,as shown at 20. Sleeve I5 is knurled on the outside and the forwardportion of its bore is threaded at IB. The diameter of the rear portionI'I of its bore is substantially equal to the outside diameter of hoseI3. The portion I8 of said bore intermediate of threaded portion I5 andrear portion I1 tapers down from the diameter of the bore at portion I6to that at portion Il.

Split bushing I9 has a serrated bore and when open has roughly adiameter equal to the normal outside diameter of hose I3. The outside ofbushing I9 is beveled at both ends.

To attach hose I3 to body 9, sleeve I5 and bushing I9 are lrst looselymounted on the end of hose I3. Nipple I2 is then pushed into hose I3.Threaded portion I6 of sleeve I5 is then screwed on threaded portion IIof body 9. As sleeve I5 is screwed on, its tapered portion I8 rides onthe rear bevel of bushing I9. At the Sametime the countersunk portion i0of body 9 rides on the front bevel of bushing I9. This closes bushingI9, causing it to compress hose I3 tightly about nipple I2.

The alternate form shown in Fig. 6 is similar to that shown in Figs. 1to 5 inclusive, except that bushing 2l has no bevel at its forward end.a bevel being provided only at its rear end, and body 23 has a flat rearface 22, instead of the countersunk face of body 9 in Fig. 3.

'I'he form shown in Fig. '7 is similar to that shown in Figs. l to 5inclusive but with the addition of a split ring 24 interposed betweenthe inside of bushing I9 and hose I3. Ring 24 is so set in bushing I9that its split is away from the split in the bushing. Ring 24 causeshose I3 to be subjected to a very much higher compression locally in theregion of the ring, than elsewhere, yet requiring not much increase inthe ,force used to screw on sleeve I5. This local increase in pressureacts as a very eicient iiuid stop.

In the form shown in Figs. 9, 11 and 12,a soft brass bushing 25 is used.'I'his bushing further differs from bushing I9 shown in Fig. 5, in thatit has walls continuous circumferentially.

Body 26 of Figs. 9, l1 and 12 is in general similar to body 9 of Fig. 3,and has its rear face countersunk and tapered at 21. Sleeve 28 has theforward portion of its bore threaded at 29. The diameter of the rearportion 30 of its bore is substantially equal to the outside diameter ofhose I3. The portion 3| of said bore, intermediate of threaded portion29 and rear portion 30, tapers down from the diameterof the bore atthreaded portion 29 to that at portion 30. 'I'he outside of bushing 25,when undeformed, is beveled at both ends, as seen in Fig. l1. Withbushing 25 and sleeve 28, loosely mounted on hose I3, as shown in Fig.11, the end of the hose is pushed on nipple 32. Threaded portion 29 ofsleeve 28 is then screwed on threaded portion 33 of body 26. As sleeve28 is screwed ,on its tapered portion 3I rides on t'he, rear bevelushing 25.

2,1es,ooc

At the same time, the tapered portion 2`I of body 26 rides on the frontbevel of bushing I9. Continued screwing on of sleeve 28 crushes in thefront and rear ends of bushing 25 so that it bites into hose I3. In themodified form shown in Fig. 10, the rear face 33' of body 34 is fiatinstead of tapered as in Fig. 9. Soft brass bushing 35 is beveled at itsrear end only. Sleeve 36 has a tapered portion 31 for engaging the taperat the rear of bushing 35, as said sleeve is screwed onto body 34.Continued screwing of sleeve 36, crushes in the rear end of bushing 25so that it bites into hose I3.

In all the forms of my coupling illustrated, the forward end of thebushings I9, 2I, 25 and 35 is forced against the rear face of body 9,23, 26 or 34. For example, in Fig. 3, the forward end of bushing I9 isforced against taper 20 at the rear of body 9 and in Fig. 6, the forwardend of bushing 2| is forced against the rear face 22 of body 23.

I claim:

A coupling member adapted to be attached to the end of a hose,comprising a body, a nipple extending rearwardly from the body forinsertion into the hose. a sleeve tting on the hose suitable forscrewing up from the rear upon the body, a split spring bushing placedover the hose and inside the sleeve, and a split wire ring placed on thehose inside the bushing, said sleeve and bushing having tapered matingportions reducing the bushing in diameter for clamping the hose on thenipple and for forcing the ring into the hose, when said nipple isscrewed up, said bushing being of sucient length to clamp a substantiallength of hose to the nipple beyond said ring.

MORRIS KATCHER.

